Internal combustion engine.



A. & R. LAFONTAINE. INTERNAL. GOMBUSTION ENGINE. APPLICATION FILED AUG.28, 1911.

1,019,495. I Patented Mar.5,1912.

2 SHEETS-SHBET 1.

A. & R. LAFONTAINE. INTERNAL COMBUSTION ENGINE.

APPLICATION PiLED AUG. 26, 1911.

Patented Mar. 5, 1912.

Q 2 SHEETS-SHEET 2.

MM QN Witnesses UNITED STATES PATENT OFJHIUE.

ALONZG LAFONTAINE Ann nosamo'mrommns, or s'r. STANISLAS. QUEBEC.

. cannon.

,To g'ill whom Be it known that we, ALONZO LAFONTAINE and. RosAn'o'LAroNTAiNn, both subjects of the: King of Great Britain, 'andresidingat St fStanislas, in the county of Champlain,

Province of. Quebec, Canada, have invented certain new and usefulimprovements in InternaLCombustwn En mes; and :we do hereby declare thatthe ollowing is a full,

clear, and exact description. of ,the invention, such as. will enableothers skilled in the ra y n V Fig. 3,, through one of the cy der; andanother object is to provide a simply,,constructed, compact, eflicient,and ecoartto which it appertains to make and use the same.

l The invention to be'hereina fte r described relates to internalcombustion engines.

In order to more clearly'disclofset'he construction,operation, andusc-of-the invention,.,referencc should be had to the accoment.application.

Throughout the several figures of the inders; and Fig..5-1s afragmentary sectional View showing. one set of pistons at the completionof thecompression-stroke. i j I l One object of the invention is togreatly ,1 simplify the valve construction and the valve operatingparts; another object is to providemeans for mounting thefly wheelshaftfentirely outside of'the engine'cylinnom'ical engine with thefewest possible number of working parts.

Referring to the drawings in detail, 1 indicates any desired form orconstruction of asuitablebase from which extend the 'up-' rights or sidearms 2 in which is .mounted the lateral spacing and supporting block 3 I"inthe upper concave face of which rests the upper cylinder of theengine. 011 the base ofthe machine is a second cylinder, an .exactduplicate of the upper cylinder. Preferably, each cylinder is jacketedor provided with a surromiding spaced wall.

Each cylinder receives motive 'fiuid through inlet openings or ports 4-through the side walls of the cylinder and close to the ODDO' ll5uicifloatton ot Ietters Patent. Application fl led'August 28, 1811.Serial No. 646,335.

drawings forming part of the pres-v INTERNAL concussion ENGINE.

Patented Mar. 5, 1912.

site ends thereof. The exhaust passes from the cylinder through anoutlet or exhaust "gitudinally reciprocable piston head 7, carried bythe sliding piston rod 8. The corresponding rods of tlie'two cylindersare connected in pairs by yokes 8 which are slidably mounted on guidebars 9 extending from the end plates or caps of the cylinders. Each ofthese sliding yokes, in turn, is provided with a wrist pin 10 on whichis journaled one end of a pitman 11. The opposite end of the pitman isjournaled on one crank of the shaft 12 of the usual. fly wheel 13. Thiscrank shaft, as clearly shown in Fig. 1, is journaled in the block. 3and uprights 2entirely outside of either cylinder. From the feed portsor openings 4 the motive fluid passes along the ducts or grooves 14, inthe interior walls of the cylinders until it gets bythe pistons 7. Thenitrushes into the space between the pistons. As the pistons advancetoward each other, the inner ends of grooves or ducts 14 will be closedor out off by them and the-charge will be compressed. As the pistonsreach their inward limit and the charge is at its maximum com ression,it willbe exploded by the spark rom plug 15. The explosion drives thepistons apart and toward their initial positions 'at the opposite endsof the cylinders. Slidably mounted in one of each pair of the pistons isa block or disk 16 carried by a bar 17 slidably mounted in a tubularbore extending through the piston rod of that particular piston. Eachbar 17 has only a limited sliding movement determined by the position ofa stop pin 18 passed through the projecting portion of the bar andengaging the end of the corresponding piston rod, after each exhaust, asshown in Fig.3. It is held.in'this position by a leaf spring '190r thelike secured at its center to one end of the guide bar 9 and arranged sothat its opposite ends will be engagedby the'ends of the rods 17 justprior to exhausting, forcing the spring, temporarily, to the dotted lineposition, the full line position being restored again immediately uponcompletion of the exhaust.

Each of the blocks or.disks 16, when in the 'full line position of Fig.3, is adapted in full line in Fig. 5, 'at this time.

' piston, is so proportioned as to completely number ot cylinders.

to close an exhaust port 20 in the corresponding piston 7. When in thefull line position of Fig. 7, the port 20 is left uncovered. Theuncovering of the port 20 is dueto the compression of the motive fluidbefore its explosion, and to its expansion at and after explosion. Theport 20 is adapted to be alined with a similar port or exhaust passageextending through the cylinder Wall, such alinement' occurring at theinstant that the piston 7 reaches its war- Ward limit. It will beremembered that the block'or disk 7 is in the position shown Theexansive force of the exploded charge will )6 suflicient to hold theblocks in this position and overcome the power of the'spring 19 untilthe exhaust rushes out through the exhaust port 20 and the alinedexhaust port ,in the cylinder. AS soon as the exhaust takes place, thespring ist'ree to act aml the blocks or disks 16 will be driven inwardto cover the port 20. .\t the instant that the block 16' closes-theexhaust port 20. the inner ends of the ducts or grooves l-t will beuncovered by the continued rearward movement of the pistons 7. at bothends ot' the cylinders, thus admitting a fresh charge. That part 21 otthe piston. lying between the exhaust port 20 amt the inner end of thecover the inner ends ol the duetsor grooves it during the short timethat any part. ol' the exhaust port '20 is in alinement with the exhaustport leading through the. cylinder wall. 3y such a construction. thevalve htoeltanisin controlling the l'eed aml exhaust. is reduced to thesimplest possible and is arranged with great compactness. .\t the sametime. there is praetieallv no vibration. as has been clearly proved byartual operation.

It is obvious that the invention may be readily applied either to asingle cylinder engine or to an engine of practically any Likewise. twooi more cylinders may be used with only a single piston in each andthese pistons may be arranged to work alternatel in opposite directionsor in the same direction. Ur. again, a single cylinder with a singlepiston therein may he used.

Only one preterred application of the in-- vention has been shown inthe. present drawings. in order to clearly disclose the same.

It is thought that the operation and useof the invention will be clearfrom the pre ceding detailed description.

(.hanges maybe made in theconst ruetiou.

arrangement, and disposition of the several parts of the inventionwithout in any way departing from the field and scope of the same and itis meant to include all such within this application wherein only apret'erred form has been'diselosed.

Having thus fully descrihedour invention. what we claim as new and.desire to secure by Letters Patent is:

l. in combination.- an engine cylinder provided with an exhaust port. apiston slidably mounted in said cylinder and provided with an exhaustport adapted to be alined with the port in said cylinder, a blockslidably mounted in said piston and adapted to close the port therein.and means for moving said block to operative position.

in combination. an engine cylinder provided with an exhaust port, apiston slidably mounted in said cylinde' and provided with anexhaustport adapted to be alined with the port in said cylinder, a hollowpiston rod connected to said piston, a bar slidably mounted therein. ablock can port in said piston. and means adapted to engage the aforesaidbar block.

3. in combination. an engine cylinder provided with an exhaust port, apiston slidably mounted in said cylinder and provided with an exhaustport adapted to be aliued with the port in said cylinder, a 1101- lowpiston rod connected to said piston, a bar slidably mounted therein, ablock carried by said. bar and adapted to cover the port in said piston.and means for yieldingly engaging said-b: and actuating said l lt:('l\'as the aforesaid piston approaches the limit ol its outward movement.

l. in combination. an engine cylinder prmided with, an exhaust port anddelivery dnrts. a piston slidably mounted therein and prmided with anexhaust passage adapted to be alined with the port in said cylinder,said piston being also' provided with a part adapted to ("over amt closethe inner ends ol said delivery duets during such alinemeal. adisk'mounttal in said piston and adapted to close the port therein, andmeans l'or actuating said disk.

in witness wlu-reol' we have hereunto set our hands in the presence oftwo witnesses.

\l'iln ssest I and actuate said

